Currently the engine is fuel injected but controlled carburetor seems like a good thing to try.

Although power savings can be achieved in some real application, not a big concern here, as the fuel pressure is provided by pressurized air in a strong PET bottle.

* It will turn out if it yields some other benefit.

Carburetor control can be implemented using the same mechanism as for wood gas / producer gas mixture control (which obviously cannot be injected).

* See boostcontrol, pgas target mode.

Actuator:

* Only PWM-type solenoid is supported currently

** not with stepper yet (2010-07-09), but we can implement that on request if you use a stepper valve or actuator in the carburetor to adjust lean/rich mixture.

** Decide if 1 stepper is enough, or 2 steppers needed (one 4-wire bipolar and one 6-wire unipolar supported by v3 hardware)